... 3% 3SiO2 3.0% 4Hardness(mohs) 9 5 Ture Density 3.9 Brown aluminium oxide/brown fused alumina(A)Al2O3 95%............Fe2O3 0.3%....SiO2 1.5 ... %......TiO2 3.0.%........ Magnetic material content 0.05%.....color ... # 2000#,2500#,3000#,4000#Refractory grade:1-0mm,3-1mm,5-3mm,5-8mm -200mesh,-240mesh,-320mesh PurposeSpecificationChemical Composition ...